Frequent frosting is a sure sign of warm air leaking into fridge.
Part numbers.....
Upper Door Liner Assy
*Gray Door Gasket....#6182005
*White Door Gasket...#620076 (old #619627)
Lower Door Liner Assy
*Gray 6' Door Gasket.........#618310
*White 6' Door Gasket........#620077 (old #619629)
*Gray 8' Door Gasket.........#630255 (old #618270)
*White 8' Door Gasket........#620081 (old #619631)
You can attempt to reset door gaskets by sticking a some cotton balls in the 4 corners (under gasket) and then warming the seal with a hair dryer. When the complete seal is warm.remove cotton balls and close door letting it cool in place.
Sometimes it works just depends on age/condition of seal